Fluorinated cyclic esters and polymers thereof



United States Patent O 3,249,596 FLUORINATED CYCLIC ESTERS AND POLYMERS THEREOF QgderrR. Pierce George A. Griudahl, and. Anthony J. Butler, Midland, Mich., assiguors to Dow- Corning Corporation, Midland, Mich., Michigan-- No Drawing. Filed Feb...7, 1964, Ser. No. 343,201, 19 Claims. (Cl. 260-895) This application relates to new-'fluprinated, cyclic alcohols, the acrylate esters of these alcohols, and polymers thereof. These polymers have properties similar to other polyacrylate plastics, -but theycexhib'it added thermal stability and' solvent resistance due to the large amountof fluorine that is present in'ithe composition. Thus, theyare useful for. coatings v andin making molded articles.

The .fluorinated, cyclic alcohols of thisinvention have the generalformula of.

RF(ORF ..0FHOFO0H olefinic carbon atom and-the alcohol itself goingto the other.

Rtcan be fluorine,- hydrogen, or any perfluoroalkyljradii cal such as trifluoromethyl, pentafluoroethyl, perfluoroisobutyl; or perfluorooctyl;

R and R" can be hydrogen or any lower alkyl radical such as methyl, ethyl, isobutyl, onhexyl.

The, alcohol-sv of. this invention can be esterified, with aerylieormethacrylic acid toformmonorners fromwhich the polymers, of this ,inyentioncan be made.

This esterificationreaction is best done in the presence f. rifluoroacetic. uhydride. which. is. m xedwith he, acrylic or methacrylic acid, the alcohol then being added. The...reactiontemperatureshou1d .h ...knt low. preferably below 15 C. duringthe mixing of the acrylic acid and the trifluoroaceticanhydride, and below 25 C. during the esterification of the alcohol; Under these conditions the trifluoroacetic anhydride does not esterify with the alcohol of this invention to any significant degree.

The esterified composition of this,invention has the following formula:

where Q iseither methyl or hydrogen.

These esters polymerize in the presence of free radical generators such as ditertiary butyl peroxide, through the a corporation of a Patented May 3, 1966 opening up of the double bond on each estermoleculeto.

form long chain polymers with pendent. groups, each polymer unit, therefore, being More than one. species of'this unittcan 'beipresentrin a:

polymer of this invention. Copolymers of? the units above described are-within the scopeof this application.

Due to the size and high fluorine content of the pendent groups of the polymers of this invention, the superior heat-r is nt pr p rt f: he polymer an: e; Well understood.

Thefollow-ing examples are illustrative;onlyandshould not ;be;c onstrued as limiting-the ,invention,;which .is properly delineated in the appendedclaims.

Example 1 484 g. of perfluorocyclopentene, 150 g. of anhydrous methanol, and 10 g. of ditertiary butyl peroxide were placed in an evacuated, chilled stainless steel bomb. The bomb was placed on a rocker and heated overnight at C. the heat being controlled by an inside thermocouple.

The bomb was removed from the rocker, chilled, vented, and the contents fractionated.

266 g. of

were recovered, which is 78% of the theoretical yield.

Example 2 A stainless steel bomb was evacuated, chilled, and charged with 316 g. of perfiuorocyclopentene, g. of absolute ethanol, and 7 g. of ditertiary butyl peroxide. The bomb was heated at 120 C. overnight.

The bomb was chilled, vented, and the contents fractionated.

A sizeable yield of CFKOFQZCFHCFCHOH was recovered.

Example 3 Into a one liter, S-necked flask fitted with a stirrer, additionfunnel, thermometer, and reflux condenser was placed 49 g. of glacial acrylic acid. The flask was chilled to 0 C. 143 g. of trifluoroacetic anhydride was slowly added, the temperature of the flask being kept below 15 C. To this was added g. of

at such a rate so as to keep the temperature of the flask below25t C.

The flask was stirred overnight and the contents were then washed with water, followed by 200 ml. of 5% sodium hydroxide, and then the contents were again washed with. water.

The product was dried andfractionated to yield 3 4 Example 4 H The experiment of Example 3, was repeated using 18 g. cF, cF, ,oHFoFoHooc= H,

u u e n J of acrylic acid, 48 g. of trifluoroacetrc anhydrrde, and 55 OH! H. of 5 was recovered from the fractionation;

CFACFMCHFOFCHOH 1 Example 6 H1 21 g. of Hydroquinone and copper powder was added prior to H fractimlationomen OHFCFOH 0OOH=CH A 73% theoretical yield of Lilla was added to a vessel containing 0.053 g. of K S O H I 38 ml. of water, and 0.635 g. of sodium lauryl sulfate. WFOHOCCH CH This was heated 'to 45 C. overnight, and then for H8 15 an additional four hoursat 52 C. was recovered. The product was a thermoplastic polymer that was Example 5 soluble in cold acetone, consisting essentially of The experiment of Example 3 wasrepeated, using 18 g. CH CE of methacrylic acid,f45 g. of trifluoroacetic anhydride, 20 and 50 g. of I CFACFMCHFCFCHOH CH CFCHF(CF;) GF

L ..-J l L .-l

CH3 units. The flask was stirred about 32 hours at room tem- 25 Example 7 perture. When 15 g. each of the following fluorinated cyclo- The product was washed in the manner of Example 3, olefins are reacted with 10 g. each of the following and then was fractionated with a small amount of hydroalcohols in the presence of l g. of ditertiary *hutyl quinone and copper powder. peroxide, the following products are formed:.

Olefin Alcohol Product CH; CH; CF CF CF=CF CHOH omoFioHFoFo OH CH3 Ha CeF OFcF OF=CF O H CH OH C FfiCFCFgCHFGFCHOH 1 l u r: i l CF; 0H, 0F ,0F=0F omomc momofl CH;(('JF),OFHOFCHOH OH: OHCHiCH;

7 CF:(CF:)3'CF=CF C,H;CH,OH CF:(CF;);CFHCFCHOH CzHs CF;CF(CFH);CF=CF omoH CF;OF(CEH):CFHCFCH5OH L l...- l

Example 8 When the following fluorocycloalcohols are reacted with acrylic acid in the presence of trifiuoroacetic acid anhydride, the following products are formed:

Example 9 When the following fluorocycloalcohols are reacted with methacrylic acid in the presence of trifluoroacetic acid anhydride, the following products are formed:

- 1H5 C1115 CH3 n 0 mom-c FHhC FHC FC-H OH CF;CF(C FHhC FHC F cH,0 00:011,

L l l Example 10 When the following esters are polymerized in the manner of Example 6, polymers are obtained which contain the following units:

Ester Polymer Unit OH: (I? (a) 100% '0 Inc FZCHFC -F |h0-0 CH=CH1 -OH-OH,- 100% I CHzC-CFCHFO F20 F:

L J CH3 OF: H (b) 100% 01min FHO FCHOCOH=CH1 cH-oH, 100 l L HCH CH: =0

Ha CF;

( 311-01 0 FHUJ F);CH

' CHSCHCHQCHQ m H (c) 100% 6M0 FmCFHG 1 -01110 CC=CH1 CH;

H: H: 4)CH2-. 100% CHaHIC F 0 FE (0 F930 FCzF;

(I? CH: ((1) 100% 0 1 ,(0 F930 FHCF(I3HOC 0=0H1 -CH: 100% 02H: HI J)I=O C Hu JHO FC FH C Fmo F,

1: E (e) 10% CFaCF(CFH)3C FHCF'OH OC(IJ=OH1 i (|1LCHz- 10% CFCFH(C FHhOFCF;

H 80% o Fz(C F010 FHC FCHOQ 0H=0H, CH0H, 80%

CH2(BH Ester Polymer Unit II 10% GoF1aCF(CF2):O FHO FCHOCOH=CHg CHCH:

uHn =0 10% (lgHnH C F CHF (C F920 F CgFn Example 12 Example 11 When the following fluorocycloalcohols are reacted When 15 g. each of the following fiuorinated cyclo- 15 with acrylic or methacrylic acid in the presence of triolefins are reacted with 10 g. each of the following 7 fluoroacetic acid anhydride, the following products are alcohols in the presence of 1 g. of ditertiary butyl peroxide, the following products are formed:

a 9 That which is claimed is: 1. A composition of the formula R c CRF(C RF),',CFHCF(IJOC CQ=CH1 where R is selected from the group consisting of fluorine, hydrogen, and perfluoroalkyl radicals, R and R" are each selected from the group consisting of hydrogen and lower alkyl radicals, .Q is selected from the group consisting of hydrogen and methyl, and n is an integer of 1 through 3.

' u omormornorcmooorhom II omcFmcFHoFcmoo 3:61:, l l

i CF,(CF1)aCFHO Fomo ocH=om omwmnoFHoFoHo CG=CHI CH: H3 7. A polymer comprising units of the following formula -o -omwhere R is selected from the group consisting of fluorine, hydrogen, and perfluoroalkyl radicals, R and R" are each selected from the group consisting of hydrogen and lower alkyl radicals, Q is selected from the group consisting of hydrogen and methyl, and n is an integer of 1 through 3.

8. A homopolymer consisting of units of the following formula --C QCH:

5 R' 5-CFOHF(C RF).0 RF

where R is selected from the group consisting of fluorine, hydrogen, and perfluoroalkyl radicals, R and R are each selected from the group consisting of hydrogen and lower alkyl radicals, Q is selected from the group consisting of hydrogen and methyl, and n is an integer of 1 through 3.

9. A copolymer consisting essentially of at least two species of the following type of unit:

- o GH,

v II

. a 10 s V where R is selected from the group consitsing of fluorine, hydrogen, and perfluoroalkyl radicals, R and 'R are each selected from the group consisting of hydrogen and lower alkyl radicals, Q is selected from the group consisting of hydrogen and methyl, and n is an integer of 1 through 3.

10. A polymer comprising units of the following formula -cH-0Hi 11. A polymer comprising units of the following formula:

-CHg 12. A 'polymer comprising units of the following formula:

{:0 (BH -(EFCHF(CF:)3CF

13. A polymer comprising units of the following formula:

CH; 5 CH,

JJHg-OFCHF(CF2):CF; 14. A polymer comprising units of the following formula:

CH3 (5'CH5 15. A homopolymer consisting of units of the following formula:

CHCH2 16. A homopolymer consisting of units of the following formula:

17. A homopolymer consisting of units of the following formula:

-CH-CH2- 18. A homopolymer consisting of units of the following formula:

ing formula:

References Cited by the Examiner UNITED STATES PATENTS Linn 260-617 Linn 260-617 Bittles. 260-895 Ahlbrecht 260-861 Ahlbrecht et a1. 260-861 Barr 260-861 Andreades et a1. 260-617 JOSEPH L. SCHOFER, Primary Examiner;

DONALD E. CZAJA, Examiner. 15 H. WONG JR., Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,249,596 May 3, 1966 Ogden R. Pierce et al.

It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent. should read as corrected below.

Column 4, line 1, the formula should appear as shown below instead of as in the patent:

C1 (CF CI LFCFCHOCC=CH columns 5 and 6, second table, under Ester, formula (c) should appear as shown below instead of as in the patent:

C F (l) 100 CF(CF CFHCFIH OC(II=CH columns 7 and 8, second table, first formula under Product, the formula should appear as shown below instead of as in the patent:

CE [CF CFHCFCH OCC=CH column 9, line 36, the formula should appear as shown below instead of as in the patent:

CH CH column 10, line 1, for "consitsing" read consisting Signed and sealed this 24th day of October 1967.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. EDWARD J BRENNER Attesting Officer Commissioner of Patents 

7. A POLYMER COMPRISING UNITS OF THE FOLLOWING FORMULA 